These are now generated from syscall.tbl, which is the most accurate.

Fixes missing riscv_hwprobe, riscv_flush_icache.

On riscv32:
 - Removes `io_getevents`
 - Renames `fcntl` -> `fcntl64`
 - Removes `renameat` (use `renameat2`)
 - Renames `statfs` -> `statfs64`
 - Renames `fstatfs` -> `fstatfs64`
 - Renames `truncate` -> `truncate64`
 - Renames `ftruncate` -> `ftruncate64`
 - Renames `lseek` -> `llseek`
 - Renames `sendfile` -> `sendfile64`
 - Removes `pselect6` (use `pselect6_time64`)
 - Removes `fstatat64`
 - Removes `fstat`
 - Removes `timer_{set,get}time}` (use `timer_{set,get}64`)
 - Removes `timerfd_{set,get}time}` (use `timerfd_{set,get}64`)
 - Removes `clock_{set,get}time}` (use `clock_{set,get}64`)
 - Removes `utimensat` (use `utimensat_time64`)
 - Removes `futex` (use `futex_time64`)
 - Removes `nanosleep` (use `clock_nanosleep_time64`)
 - Removes `sched_rr_get_interval` (use `sched_rr_get_interval_time64`)
 - Removes `rt_sigtimedwait` (use `rt_sigtimedwait_time64`)
 - Removes `{get,set}timeofday`
 - Removes `mq_timedsend` (use `mq_timedsend_time64`)
 - Removes `mq_timedreceive` (use `mq_timedreceive_time64`)
 - Removes `semtimedop` (use `semtimedop_time64`)
 - Renames `mmap` -> `mmap2`
 - Renames `fadvise64` -> `fadvise64_64`
 - Removes `rescvmmsg` (use `recevmmsg_time64`)
 - Removes `wait4`
 - Removes `clock_adjtime` (use `clock_adjtime64`)
 - Removes `io_pgetevents` (use `io_pgetevents_time64`)

On riscv64:
 - Removes the time64 syscalls, which are 32-bit only.
 - Removes `renameat` (use `renameat2`).
 - Removes `fstatat` (use `newfstatat`).

Includes:
 - all: `file_{get,set}attr`
 - x86-64: `uprobe`